We claim the ornamental design for an upper portion of sock, substantially as shown and described.
FIG. 1 is a side perspective view of an upper portion of sock showing our new design;
FIG. 2 is an elevational view of the right side thereof;
FIG. 3 is an elevational view of the left side thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a side perspective view of an upper portion of sock in a different position of use;
FIG. 9 is an elevational view of the left side thereof;
FIG. 10 is an elevational view of the right side thereof;
FIG. 11 is a front elevational view thereof;
FIG. 12 is a rear elevational view thereof;
FIG. 13 is a top plan view thereof; and,
FIG. 14 is a bottom plan view thereof.
The dash-dash-dash-dash type broken lines shown in the drawings are included for the purpose of illustrating environmental structure and form no part of the claimed design.
The dot-dash-dot-dash type broken lines shown in the drawings define the boundaries of the claimed design.